define(function (require, exports, module) {
    var myMath = {
        add: function (arg1, arg2) {
            /**
             * 精确加法计算
             */
            arg1 = arg1 || 0;
            arg2 = arg2 || 0;
            var r1, r2, m;
            try {
                r1 = arg1.toString().split(".")[1].length;
            } catch (e) {
                r1 = 0;
            }
            try {
                r2 = arg2.toString().split(".")[1].length;
            } catch (e) {
                r2 = 0;
            }
            m = Math.pow(10, Math.max(r1, r2));
            return (arg1 * m + arg2 * m) / m;
        },
        sub: function (arg1, arg2) {
            /**
             * 精确减法计算
             */
            return this.add(arg1, -arg2);
        },
        mul: function (arg1, arg2) {
            /**
             * 精确乘法计算
             */
            arg1 = arg1 || 0;
            arg2 = arg2 || 0;
            var m = 0, s1 = arg1.toString(), s2 = arg2.toString();
            try {
                m += s1.split(".")[1].length;
            } catch (e) {
            }
            try {
                m += s2.split(".")[1].length;
            } catch (e) {
            }
            return Number(s1.replace(".", "")) * Number(s2.replace(".", "")) / Math.pow(10, m);
        },
        div: function (arg1, arg2) {
            /**
             * 精确除法计算
             */
            arg1 = arg1 || 0;
            arg2 = arg2 || 0;
            var t1 = 0, t2 = 0, r1, r2;
            try {
                t1 = arg1.toString().split(".")[1].length;
            } catch (e) {
            }
            try {
                t2 = arg2.toString().split(".")[1].length;
            } catch (e) {
            }
            r1 = Number(arg1.toString().replace(".", ""));
            r2 = Number(arg2.toString().replace(".", ""));
            return (r1 / r2) * Math.pow(10, t2 - t1);
        }
    }

    module.exports = myMath;
});
